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Serum Chymotrypsin-Like Activity on Digestion of Ala-Ala-AMC as a Substrate, Among CML and AML Patients at TASH, Addis Ababa Ethiopia: A Comparative Cross-Sectional Study
American Journal of Life Sciences
Volume 7, Issue 1, February 2019, Pages: 5-11
Received: Dec. 25, 2018; Accepted: Feb. 7, 2019; Published: Feb. 25, 2019
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Endriyas Kelta Wabalo, Department of Biomedical Sciences, Jimma University, Jimma, Ethiopia
Abdulaziz Abubeker, Department of Internal Medicine, Addis Ababa University, Addis Ababa, Ethiopia
Chala Kenenisa Edae, Department of Biomedical Sciences, Jimma University, Jimma, Ethiopia
Belay Zawdie, Department of Biomedical Sciences, Jimma University, Jimma, Ethiopia
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Proteosome, composed of 19S and 20S subunits, is vital for AML and CML cell cycling, proliferation, adhesion and as a means to by-pass apoptosis through three distinguishable proteolytic activities. Chymotrypsin-like (CT-L) activity is rate limiting and a well-established therapeutic strategy for AML and CML cells, by proteosome inhibitors than the other two proteolytic activities: trypsin-like activities and caspase-like activities. As the main objective of the study, the serum levels of Chymotrypsin-like activity was assessed among chronic and acute myeloid leukemia patients, and compared among each other and with those of healthy controls. A hospital-based comparative cross-sectional study was conducted among CML and AML patients from February 2016 up to December 2016. Serum samples were obtained from 24 AML, 60 CML and 35 presumed healthy controls. Fluorogenic assays for serum chymotrypsin-like activity using aminomethylcoumarin (AMC) peptide derivatives were carried out. Statistical analysis was done by using SPSS version 20. Descriptive statistics, Paired Samples T-test, Wilcoxon Signed Rank test and Spearman’s rho test were used to investigate any correlation among different parameters. The minimum level of statistical significance was set at p-value 0.05. The mean and median serum levels of Chymotrypsin-like activity were significantly higher in patients with CML and AML than in the healthy controls (P-value < 0.05). CML patients in chronic phase (CP) and secondary AML patients had significantly higher mean and median serum levels of Chymotrypsin-like activity than CML patients in accelerated/blast phase (AP/BP) and de novo AML patients (p-value < 0.05). As a conclusion, the serum Chymotrypsin-like activity level might be a useful diagnostic test, and may be used as prognostic test particularly in a subset of CML patientsin chronic phase (CP) and Secondary AML patients. However, further studies that incorporate other protocols such as chymotrypsin-like activity enzyme-immunoassay with large scaled study population are warranted to decide on prognostic and diagnostic role of the enzyme more accurately.
CML, AML, Serum Chymotrypsin-Like Activity
To cite this article
Endriyas Kelta Wabalo, Abdulaziz Abubeker, Chala Kenenisa Edae, Belay Zawdie, Serum Chymotrypsin-Like Activity on Digestion of Ala-Ala-AMC as a Substrate, Among CML and AML Patients at TASH, Addis Ababa Ethiopia: A Comparative Cross-Sectional Study, American Journal of Life Sciences. Vol. 7, No. 1, 2019, pp. 5-11. doi: 10.11648/j.ajls.20190701.12
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This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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